intel_tex_validate.c revision a728646fb55245477d35e2761c3e0d15099b4cd4 
1#include "main/mtypes.h"
2#include "main/macros.h"
3
4#include "intel_context.h"
5#include "intel_mipmap_tree.h"
6#include "intel_tex.h"
7
8#define FILE_DEBUG_FLAG DEBUG_TEXTURE
9
10/**
11 * When validating, we only care about the texture images that could
12 * be seen, so for non-mipmapped modes we want to ignore everything
13 * but BaseLevel.
14 */
15static void
16intel_update_max_level(struct intel_context *intel,
17		       struct intel_texture_object *intelObj)
18{
19   struct gl_texture_object *tObj = &intelObj->base;
20
21   if (tObj->MinFilter == GL_NEAREST || tObj->MinFilter == GL_LINEAR) {
22      intelObj->_MaxLevel = tObj->BaseLevel;
23   } else {
24      intelObj->_MaxLevel = tObj->_MaxLevel;
25   }
26}
27
28/**
29 * Copies the image's contents at its level into the object's miptree,
30 * and updates the image to point at the object's miptree.
31 */
32static void
33copy_image_data_to_tree(struct intel_context *intel,
34                        struct intel_texture_object *intelObj,
35                        struct intel_texture_image *intelImage)
36{
37   if (intelImage->mt) {
38      /* Copy potentially with the blitter:
39       */
40      intel_miptree_image_copy(intel,
41                               intelObj->mt,
42                               intelImage->face,
43                               intelImage->level, intelImage->mt);
44
45      intel_miptree_release(intel, &intelImage->mt);
46   }
47   else {
48      assert(intelImage->base.Data != NULL);
49
50      /* More straightforward upload.
51       */
52      intel_miptree_image_data(intel,
53                               intelObj->mt,
54                               intelImage->face,
55                               intelImage->level,
56                               intelImage->base.Data,
57                               intelImage->base.RowStride,
58                               intelImage->base.RowStride *
59                               intelImage->base.Height);
60      _mesa_align_free(intelImage->base.Data);
61      intelImage->base.Data = NULL;
62   }
63
64   intel_miptree_reference(&intelImage->mt, intelObj->mt);
65}
66
67
68/*
69 */
70GLuint
71intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit)
72{
73   struct gl_texture_object *tObj = intel->ctx.Texture.Unit[unit]._Current;
74   struct intel_texture_object *intelObj = intel_texture_object(tObj);
75   int comp_byte = 0;
76   int cpp;
77   GLuint face, i;
78   GLuint nr_faces = 0;
79   struct intel_texture_image *firstImage;
80
81   /* We know/require this is true by now:
82    */
83   assert(intelObj->base._Complete);
84
85   /* What levels must the tree include at a minimum?
86    */
87   intel_update_max_level(intel, intelObj);
88   firstImage = intel_texture_image(tObj->Image[0][tObj->BaseLevel]);
89
90   /* Fallback case:
91    */
92   if (firstImage->base.Border) {
93      if (intelObj->mt) {
94         intel_miptree_release(intel, &intelObj->mt);
95      }
96      return GL_FALSE;
97   }
98
99
100   /* If both firstImage and intelObj have a tree which can contain
101    * all active images, favour firstImage.  Note that because of the
102    * completeness requirement, we know that the image dimensions
103    * will match.
104    */
105   if (firstImage->mt &&
106       firstImage->mt != intelObj->mt &&
107       firstImage->mt->levels >= intelObj->_MaxLevel) {
108
109      if (intelObj->mt)
110         intel_miptree_release(intel, &intelObj->mt);
111
112      intel_miptree_reference(&intelObj->mt, firstImage->mt);
113   }
114
115   if (_mesa_is_format_compressed(firstImage->base.TexFormat)) {
116      comp_byte = intel_compressed_num_bytes(firstImage->base.TexFormat);
117      cpp = comp_byte;
118   }
119   else
120      cpp = _mesa_get_format_bytes(firstImage->base.TexFormat);
121
122   /* Check tree can hold all active levels.  Check tree matches
123    * target, imageFormat, etc.
124    *
125    * XXX: For some layouts (eg i945?), the test might have to be
126    * first_level == firstLevel, as the tree isn't valid except at the
127    * original start level.  Hope to get around this by
128    * programming minLod, maxLod, baseLevel into the hardware and
129    * leaving the tree alone.
130    */
131   if (intelObj->mt &&
132       (intelObj->mt->target != intelObj->base.Target ||
133	intelObj->mt->internal_format != firstImage->base.InternalFormat ||
134	intelObj->mt->levels <= intelObj->_MaxLevel ||
135	intelObj->mt->width0 != firstImage->mt->width0 ||
136	intelObj->mt->height0 != firstImage->mt->height0 ||
137	intelObj->mt->depth0 != firstImage->mt->depth0 ||
138	intelObj->mt->cpp != cpp ||
139	intelObj->mt->compressed != _mesa_is_format_compressed(firstImage->base.TexFormat))) {
140      intel_miptree_release(intel, &intelObj->mt);
141   }
142
143
144   /* May need to create a new tree:
145    */
146   if (!intelObj->mt) {
147      intelObj->mt = intel_miptree_create_for_teximage(intel, intelObj,
148						       firstImage,
149						       GL_TRUE);
150   }
151
152   /* Pull in any images not in the object's tree:
153    */
154   nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
155   for (face = 0; face < nr_faces; face++) {
156      for (i = tObj->BaseLevel; i <= intelObj->_MaxLevel; i++) {
157         struct intel_texture_image *intelImage =
158            intel_texture_image(intelObj->base.Image[face][i]);
159	 /* skip too small size mipmap */
160 	 if (intelImage == NULL)
161		 break;
162	 /* Need to import images in main memory or held in other trees.
163	  * If it's a render target, then its data isn't needed to be in
164	  * the object tree (otherwise we'd be FBO incomplete), and we need
165	  * to keep track of the image's MT as needing to be pulled in still,
166	  * or we'll lose the rendering that's done to it.
167          */
168         if (intelObj->mt != intelImage->mt &&
169	     !intelImage->used_as_render_target) {
170            copy_image_data_to_tree(intel, intelObj, intelImage);
171         }
172      }
173   }
174
175   return GL_TRUE;
176}
177
178void
179intel_tex_map_level_images(struct intel_context *intel,
180			   struct intel_texture_object *intelObj,
181			   int level)
182{
183   GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
184   GLuint face;
185
186   for (face = 0; face < nr_faces; face++) {
187      struct intel_texture_image *intelImage =
188	 intel_texture_image(intelObj->base.Image[face][level]);
189
190      if (intelImage && intelImage->mt) {
191	 intelImage->base.Data =
192	    intel_miptree_image_map(intel,
193				    intelImage->mt,
194				    intelImage->face,
195				    intelImage->level,
196				    &intelImage->base.RowStride,
197				    intelImage->base.ImageOffsets);
198	 /* convert stride to texels, not bytes */
199	 intelImage->base.RowStride /= intelImage->mt->cpp;
200	 /* intelImage->base.ImageStride /= intelImage->mt->cpp; */
201      }
202   }
203}
204
205void
206intel_tex_unmap_level_images(struct intel_context *intel,
207			     struct intel_texture_object *intelObj,
208			     int level)
209{
210   GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
211   GLuint face;
212
213   for (face = 0; face < nr_faces; face++) {
214      struct intel_texture_image *intelImage =
215	 intel_texture_image(intelObj->base.Image[face][level]);
216
217      if (intelImage && intelImage->mt) {
218	 intel_miptree_image_unmap(intel, intelImage->mt);
219	 intelImage->base.Data = NULL;
220      }
221   }
222}
223
224void
225intel_tex_map_images(struct intel_context *intel,
226                     struct intel_texture_object *intelObj)
227{
228   int i;
229
230   DBG("%s\n", __FUNCTION__);
231
232   for (i = intelObj->base.BaseLevel; i <= intelObj->_MaxLevel; i++)
233      intel_tex_map_level_images(intel, intelObj, i);
234}
235
236void
237intel_tex_unmap_images(struct intel_context *intel,
238                       struct intel_texture_object *intelObj)
239{
240   int i;
241
242   for (i = intelObj->base.BaseLevel; i <= intelObj->_MaxLevel; i++)
243      intel_tex_unmap_level_images(intel, intelObj, i);
244}
245